The comet Comet C/2023 A3 Tsuchinshan-ATLAS, or simply comet A3, was first detected in January 2023 at an observatory in China. This October, its journey brings it to perihelion, meaning its closest distance to the Sun, and it is so bright that it has provided many charming evenings for night sky enthusiasts, just after sunset during twilight.

This comet, like most comets, originates from the Oort Cloud, a region of ice and dust in the outer area of our solar system. Just as planets are attracted to the Sun, comets are too, but they follow a different trajectory. However, they are not strongly gravitationally bound to the star, so they spend centuries away from us. On its journey toward the Sun, it evaporates, forming its tail from various elements such as water, frozen carbon dioxide, and others. It is one of the comets whose brightness reached that of Venus, making it one of the brightest in recent decades, meaning it was visible even to the naked eye!
The comet made its appearance in the windows of the astronauts on the International Space Station.

Sources
1. https://www.bbc.com/weather/articles/cq5e6jne670o
2. https://en.wikipedia.org/wiki/C/2023_A3_(Tsuchinshan%E2%80%93ATLAS)
3. https://www.skyatnightmagazine.com/news/astronauts-photograph-comet-c-2023-a3-from-space-station